//倒计时  leftTimer: function (time) {    var that = this;    var leftTime = new Date(time) - (new Date()); //计算剩余的毫秒数     var hours = that.data.hours;    var minutes = that.data.minutes;    hours = parseInt(leftTime / 1000 / 60 / 60 % 24, 10); //计算剩余的小时     minutes = parseInt(leftTime / 1000 / 60 % 60, 10);//计算剩余的分钟     hours = that.checkTime(hours);    minutes = that.checkTime(minutes);    that.setData({      hours: hours,      minutes:minutes    })  },  //将0-9的数字前面加上0，例1变为01  checkTime: function (i) {    if (i < 10) {      i = "0" + i;    }    return i;  },